Balanced and Unbalanced Force

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Across
  1. 2. walking, and running
  2. 5. riding a skateboard
  3. 7. Falling ball
  4. 8. Revolution of Earth around the sun
  5. 9. A person standing still
  6. 10. A book sitting on a table
Down
  1. 1. A motorciycle driving in one path
  2. 3. Helium rises,a helium balloon floats
  3. 4. pushing a box
  4. 6. A bike going downhill